Typewriting machine



May 29, 1923. Mswsa v A. G. F. KUROWSKI Y TYPEWRITING MACHINE Filed Sent. 30. 1920 Patented May 29, 1923.

entree stares earner orrics.

ALFRED G. F. KUROWSKI, F BROOKLYN",- NEVJ YORK, ASSIGNOR 'IO UNDER/V7001) TYPEWRITER COMPANY, OF NEW YORK, N.-Y., A CORPORATION OF DELAXVARE,

'rYrEwnITIne MACHINE.

Application filed September T 0 all w from it may concern" Be it known that I, ALFRED G. F.1(UROV- SKI, a citizen of the. United States, residing in Brooklyn Borough, in the county of .Kings,.city and State of. New York, haveinvented certain new and useful Improvements 1 in Typewriting Machines, of which the following is a specification.

This invention relates to feed-roll releasing mechanism for typewriting machines, and is in the nature of an improvement on the invention qpointed out in my co pending application, serial No. 305,114, filed June 18, 1919. and now Patent No. 1,367,784,

} dated February 8, 1921. n In said patented invention, the front and rear feed-rolls are'supported 'byn ieans of hangers, common thereto, which are fixed on a supporting shaft at points intermediate their ends. The shaft, just referred to, is

mounted inslotted brackets so as to be guided thereby to permit movement to and from the platen, and the feed-rolls are normally held in engagement with the platen by'means of springs acting on the hangers near their rear ends, these springs being supported at their lower ends by holders adjustably positioned on a flanged tie-member connecting the endsof the platen-frame, means being provided effective'to cast off both feed-rolls against'the tension of the springs.

.- In the embodiment of the invention herein disclosed, the shaft, to which thehangers are fixed, is provided with flattened portions which are embraced by slotted brack- I ets, and arrangement whichpermits movement of the shaft toward and from the platen, but prevents rotationthereof. In order to withdraw said shaft. from the platen, provision is made of arms rigidly shaft, so shaped that, upon rotation, it will exert a camming action on the bottom walls of the slot. Itwill be seen that by placing the feed-roll-release shaft intermediate the springs and the shaft on which the hangers are fixed, there will be a decreased turning tendency of the hangers about the hanger-1 carrying shaft due to the :action of the springs, relativel to what this tendency so, 1920. Serial 110,413,671.

would be with the release shaft otherwise I shaft will be turned so as to maintain the rounded portion thereof 'incontact with the rear walls of the slots of the re arwardly and downwardly extending arms, thereby tending to prevent rotation of the hangers about the hanger-carrying shaft due to the springs. The turning tendency, due to said springs, is also guarded against by providing the rearwardlyand downwardly extending arms with portions having vertical faces engaging a vertical flange atthe rear of the flanged tie-member. It will be seen that, as a result of the present structure, the feed-rolls may be moved to and from the platen in substantially straight lines, and that fthere will be no marked tendency to cramp the flattened advantages will here:

. with my invention appliedthereto, and with the feed-rolls in the platen. v

Figure 2 is a fragmentary side view, obtained by looking at the structure of Figure l from the left, and showing the position of the parts when the feed-rolls are in position to co-operate with the platen, similarly. to Figure l. v

Figure 3 is a view similar to Figure 2, but showing the position of the parts when the feed-rolls are cast off.

' Referring to the drawings, the platen 1 is mounted in the end members 2 of the platenframe, andthe front and rear feed-rolls 3 (Jo-operative relation with and 4, which co operate therewith, are carried by shafts 5 and 6, respectively. The feed-roll shafts 5 and 6 are supported at the opposite ends ofhangers 7, the hubs 8-o-f which are fixed on a. shaft 9 whose flattened ends 10 are guided for vertical movement in i O slotted plates 11,,supported in a flanged tiemember 12, connecting the end membersQ of the platen-frame. H

In order to' yieldingly press the feed-rolls against the platen, "provisionis made of F I movement, and its tendency to rock, due

adjusted in position in the flanged tie-member 12 by means of adjusting screws 16 and 17.

The hlibs "8 of 7 are provided with arm fle extending i'eariva-rdiy and ""detvn wfaidlyf therefrom at 'the rear of and to al'owe'r levlthan .th'e hanger-carrying *s'11aft'9,- saidarms 1'8 being provided with ipor'ti'onfs '19, the rear fae'es of "which enga e avit'hfa'n upright'fiange zo of the tie-member 12,"to be guided thereby, :tor vertical; ]11'10\'6- "ment. arm's 1.8 project rigidly from the "hangers '7 and-fin] the 'paftieidar 'eonstruca tioh shown "in the drawings, arefo'rmed in onepiece"therewith. The arms 18 are proi "Videdwithclosed vertiea"1' slots 21 through "Whieh passes feed-1*o1la'eleaseshaft 22, jourhale d' in the end 'na'emhei-e '2 of the platenframe.-- The portions "of said shaft 22' passihg "through the-slots 21 -ai'e'-'p'referab1y -s'e" inenta1- in 'eross seotion and "said shaft "is nofinaily in the position shown in Fig- F tires 1 and 2.

When itds'd'esired to release or east'ofi "the "feedrolls the feed roll-release lever 28, {pivoted '5 24 on. "right-hand end *m'ember' 2'of theplaten-frame, may be depressed, and, throughunk 25 and *arIINEZGQmounted on the shaft 22, the latter may be'turned I in; a counterclockwise direction *i'ro'r'n the po- "shim-shown in Fi-gure 2t0 thatshotvn in' Figured 1 I I I w The earnportion of the feed rollrelease shaft -22'a'e'ts againstthemettomwall of the slot 21 in the arm 18 to force d'ot'vmvard thisaiim "together with the hanger-Carrying shafts and hange'r 7 -to 'ea-s'toff'the feedrelish anda. 'VVhe'n the feed-rolls are cast 7 rounded portion 0t the east ot'f shaft or 'eam sh'aft is maintained inengagement with the rear Wall of the slot 21. The "7 is guided for straight vertical to the action of the spring 13am cam-shaft 22, i's i prevented by means of the go-operating-guiding-amine of theends 10 of the e hang'er shaftt), gnide'din'thesIOttedplates' 11', and the arm '18, guidedbetween the j flange 20,;of the itie-memiher 12 and the "*r'ofinde'd' portion of.-tl1e oast-off shaft 22. *It is toi-be{noted that fthe eam-shaft22 is ,'efietiveg thro'ughthe arm 18, to apply 1'011- 5 Withdrawing force to the hanger 7 nearer to the 'end there'df Where the spring is I efie'otive thereon than'to the other end there 7 '5 *tion of thespringlii thereby to counter- Attheir lower ends, springs 13 are connected with h01ders'15, Which-may be act and diminish the -tenden y fthe -hanger 7 to' rock 'under the opposed "forces of the spring 13 and the roll releasing cam of the cam-shaft 22. I v

Provision may also-be 'made of a *Shield 27 similar'to that disclosed in the Patent, No. 1,31'55559, granted to me September 9, 1919, said shield being provided with slotted brackets 28"embracing the shaft 22.

Variations maybe resorted to ithin the seope of the in'venti'om anjd pbrtions-oit the improvements ay be used Without others. I faving thus described my invention, *1 Claim: V V i 1. {In aftypewi'iting machine in *eorhbination, a :platen, front anti-rear "feed riflls, hangers common "to both front and rear feed-rolls, a shaft ona'vhioh said hangers "are 'earried, guides for said shaft, springs "acting on "said," hangers at one side-"6f said *shaftyand meaii's ear Withdrawing said hangers an consequently, Es'a-id rolls from the p1aten,'aeting to a ply foree' to -sa'id han'gers along l'in'es at Tt'hesame side-"of said shaft as the pointsof.gapplieation of said springs, so as to countei'aetfthe twis'ting tend'e'ne'y tabofit said "shaftot "the han 'e'rs due to sald'springs *an'd means. I

*2. In a typewriting ma ehme meombina- 05 points bf :appliefiiemeflmid springs to counteract the twisting tendeney bent said shaft of the'han ewdne to sainisprings andfmeansq r 3. In type'tiriting aehine, iniieoinbination, a platen,frent-and rear feed-re11s, supporting ine'ans fo-isai'd "feed roli-s includin han ers, common:t'o 156th front a d near hadronsmeans :aeti n; on" eaeh of said hangers nea'r one of its ends, urging :th

hangers toWa' -"ds the platen, "and "means for "Withdrawing sai'd hangers,"efiectiveto ap l foree'to'said 'hange'ris nearer to the (ends I thereof where said nrgingfme'an s sare e-ffee 'tive" thereon than tothe-"other ends thereof.

I 4; In'a typ'e'writili'g*maehine,#in"combination; a platen, front: and re'ar feed-ro1ls, sn pporting 7 means for said feed rolls including hangers 'c'omm' ont'o' both 'front and frear fee'd- 'rolls, membe'rs s projecting rigidly from eaeh of said hangers, arguide for. each "of -said memhefs "to permit movement of. the :eorrespending hangers toward and from the platen, means acting on 1 each ofsai'd hangers near one 'OfltS-GIIdS to urgeth'e'same'toatrards the platen, and means for-withdrawing said hangers from the platen, effective to apply force to said hangers nearer to the ends thereof where said urging means are effective thereon than to the other ends thereof, thereby to reduce the tendency of said hangers to turnabout the guide for saidmembers.

5. In a typewriting machine, the combination with a platen and front and rear feedrolls mounted on front and rear shafts, respectively, of hangers for supporting said shafts, a shaft on which said hangers are fixed, guiding means for the hanger-carrying shaft permitting movement thereof to and from the platen, resilient means acting on said hangers at one side of the hanger-carrying shaft, to urge the feed-rolls towards the platen, arms fixed on the hanger-carrying shaft, and extending toward said resilient means, and feed-roll-withdrawing means act; ing on said arms near said resilient means to diminish the turning effect resulting from the upward thrust of the resilient means and the downward pull of the feed-roll-withdrawing means. i

6. Ina typewriting machine, in combination, a platen, front and rear feed-rolls, a

shaft for said front feed-roll, a shaft forsaid rear feed-roll, hangers common to both of said shafts, a shaft on which said hangers device acting'on each of said hangers near the rear feed-roll shaft,'to urge said feedrolls toward the, platen, said spring devices being adapted to be adjusted to and from said'feed-rolls, arms extending downwardly and re arwardly from haid hanger-carrying shaft, guiding means for said arms, acting to prevent turning of said shaft under the action of said spring devices, and a device acting on said arms ina plane passing between the hanger-carrying shaft and said spring devices to withdraw said hanger-carrying shaft, and, consequently, said feedrolls from said platen.

7. In a typewriting machine, in combination,a platen, front and rear feed-rolls, hangers common to both front andrear feedrolls, a shaft on which said hangers are fixed, guides for said'shaft, said shaft and said guides having co-o-per'ating parts Whereby turning of said shaft in said guides is prevented, springs acting on" said hangers at oneside of said shaft, an'd means for withdrawing said hangers and consequently; said rolls from the platen, acting to apply force to said hangers at the same side of said shaft as the points of application of said springs.

S. In a typewriting machine, in combination, a platen, front and rear. feed-rolls nor:

m ally engaging the lower part of the platen,

' shaft on WhlCll said hangers are fixed, means hangers common to both front and rear feedrolls, a shaft on which sald hangers are fixed,

cation of said springs, and a cam-device to act on said arms near their free ends.

9. In a typewritmg machine, in combina tion, a platen, front and rear feed-rolls nor- -mally engaging the lower part of the platen,

hangers" common to both front and rear feedrolls, a shaft on whichsaid hangers are fixed, guides for said shaft, said shaft and said guides having co-operating parts wherebyturning of said shaft in said guides will be prevented, springs acting on said hangers at one side of said shaft to urge said feedrolls toward the platen, arms fixed on said 'shaft'and extending in a direction tobring' the free ends thereof adjacent the vertical plane in which lie the points of application of said springs, and a cam-device to act on said arms near their free ends.

10. In a typewriting machine, in combination, a platen, front and rear feed-rolls normally engaging the lower part of the platen,

hangers common to both front and rear feedrolls, a shaft on which said hangers are fixed,

guides for said'shaft, springs acting on-said hangers at one side of said shaft to urge said feed-rolls toward the platen, arms fixed on said shaft and extending in a direction to bring the free ends thereof adjacent the vertical plane in which lie the points of application of said springs, a cam-device to act on said arms near their free ends, and guiding means engaging the free, ends of said arms, so as to resist the tendency to turn said shaft, due to the thrust of the springs and action of the cam-device, without interfering with the casting off of said feed-rolls.

11. In a typewriting machine, in combination, a platen, front and rear feed-rolls normally engaging the lower part of the platen, hangers common to both front and rear feedrolls, a shaft on which said hangers are fixed, guides for said shaft, springs acting on said hangers at one side of said shaft, arms fixed on said shaft, said arms having vertical slots, a release-shaft passing through said slots, said release-shaft being cut away on one side to form flat surfaces which normally engage the bottom walls of said slots, and means to actuate said release-shaft in a direction which will maintain the rounded 5 surface thereof in contact with the proper side walls of the slots to resist rotation about to limit the movement of said shaft to a prei determined ,path and to prevent stunning thereo' f, kresili'ent devices &CtlHg-0I1-Sald?hLHg ers-at'one side of said shaftto-hrgathefeedrolls against the platen, andamea'ns: i'fo'r Sirei-l'easin g said .feed rolls including ar s extendlng'from saidihange'rs ad acent the shaft towards said resilient dev1-ces,:-and a#-,am-'

device to engage said 'arms vat vpoints vacljacent said 'resilient devices.

. 13; Ina typewriting machine-,lin combinat1on,-a platen, frontaand re'ar feed rolls normally in engagement therewith, ineansto support saidfeed-rolls iin'cludi'ng shaft,

hangers common to, *both :front and rear feede'rolls, having hubs fixedfon -said shaft, arm-s exten din g do WnWardly-an d "rearvv ardliy from "said hubs, resilient :devices acting". on said hangers at the side" of -;said shaft "fIOIH which said'a-rms extend,'and ineans acting onz'said arms at points near saidresilientidevices to releasewsaid feederdlls.

I 14. Ina type'writingima'c'h'ine, in combination,: a :plat'emfront and :rear feed-rollsgnormally engaging'tlie-lower part-of the platen, hangers comment to bothzfront: and rear :feedrolls, aslraft on which :saidliangersfare fixed,

:guides for said-shaft, resilient devices acting on; said 'lrangers at one? side of said-shaft to .nrge-said feed-rolls toward the, plattemfiarms .fi-Xedonsaid hangers adjacent said- -shaftand 'extending toward. said resilient devices, :and

' a, releasing'device 'aeting (an-said aims at pointsradjiacent a vertical planethrongh .the

points :of application of said/resilient devices. i a

"1:5. 'l n a 'typewriting:maclnne, 1n combination, a platen, front: and :rear feeder-011s normally in position to 'co operate 'with the lower part ofith'e platen, hangers comm'omto .ho'th frontand Prear feed-rolls, ra'wsh-aft on which saidrhangers are fixed, guides for; said shaft, springs aetin -gi'onsaid *hangersrateene side of said s'shaf-t to urge said feed-rolls toward the platen, arms sfix'ed :onsaid shaft rand extending-win a :direction to bringthe 'free ends-thereof: adjacentthe vertical plane in which die the :points rof applicationof saidspringgs, a cam-device ito ECU-{011 said arms near theirr-freerendstoccast: off the-feedrolls, and means for guiding the vfree ends "'of'saidarms to co-operate withtlre guides for the shaft a0 preventrocking -movement iof theihangers. r v 7 16. .In' a typeivritingmachine ini combina- "tion, a platen, front :and .rearH feed-roll'se'normally 'co-operating vwith :the.&1o\ver,part of vthe platen, "a hanger zcommon to both "front xand rear feed-rolls -a hanger-carrying shaft on Which said hanger "is mounted, substantially vertical guides for said-shaft;springs acting-won saidhanger.at-'one side of said shaft tendingto press ,said, feedsrolls iinto co op'erative relation with the platen, anar-m l having a rigid connection to the hangerand projecting to a level different from said shaft, saidjarm "having a substantially vertieal closed: slot therein, a wfeed-roll-release ishaft passing through said slot at a level 1,differenbfrom:thatv occu-piediby said hangercarrying slraft, said release shaft: h-aving a irou-ndedportion forming a;-tsurface.inengagement with Zone 2 of the -side' alls iof the slot (and -l' 1a vingw-a ide pres'sedfic-a-m portion forming: a; eamisurface which ;normally en- --gages'tl1je bottom wall of tlievslot,qneansto vfrock -sai d release-shaft :to least off-the sfeed- ,rolls while, maintaining the rounded portion i or z-su'rface -thereof in rengagement with the i'SldG/Wfllli of the slot toyprevent'rocking moveanent ofdhe .heangeraahout the, hanger-carrying-:sha ft in one '-=i'direction, i and a guide -':for

'thef-hangerinithe' opposite direction. v

I7. =Inatypewr1ting mach ne, in combinanon, a platen, front and .rear feed-rolls noramally ,in p'ositio'n to ce-operate with the I lower part 3 of the ;-platen, "sit *han'gerz common :to both :front] and rear feed-rolls, a :vhange earry ing ushaft fontlwhich said han gerqis mounted, a substantially vertical guide for said shaft, a,;-sp'ring act-ing'o'n said hanger lat one side of said: shaft to urge said feedr'olls toward thee-platen, an arm rigid gwith the hanger and v extending ,to ,a' lower level thansaid.shaft;at;the-sarne side thereof as the-spring, releasing .devi'ce acting on said ,arm to "move the hanger against the tension of--saidspring for casting "oif tlre ifeedrrolls,

. and means {fQI'W snbstantially vertically ,gnid- King the freeend; Off said-zarm to, co-operate .i-wjth the guide for; said shaft to prevent mocking *IHQVCIII'QIIL I'Of the ghanger.

' 18. Ina typewritingvmachine, zindeomli i- -inat-ion, .a-Q laten, frontand reai v .v feed-rolls normally occupying a positionto {co-oper- ;ate with the lower @parrt of the vplaten, a

hanger commomto both front and rear feed- Lto the {other [feed-roll;

,19. :In a t (p evvriting' machine, rill ronihination, a I platen, [front] and rear {feed-rolls normally: occupying a position to co-operate ith the,l0-Wer;part of;tl1e platen, a hanger common to loothgfront and rear feed-rolls,

v. 1a effective ,on .the fhangerf between the feed-rolls :andlata v-pointjjneare'r to one ,of t'the' feediolls than l'to the other, and 'a .castroff, device effective? to apply Troll-Withdrawing force to (the hanger "between the feed-rolls :an'd at agpoint nearer.- to the feed- !roll where ,theffspring "i'setfective "than to 1the therYfeedQroll'.

20. In a typewriting machine, in combination, a platen, front and rear feed-rolls normally occupying a position to co-operate with the lower part of the platen, a hanger common to both front and rear feed-rolls, a spring effective on the hanger between the feed-rolls and at a point nearer to one of the feed-rolls than to the other to urge both feed-rolls toward the platen, a cast-off device effective to apply roll-withdrawing force to the hanger between the feed-rolls at a point nearer to the feed-r0ll where the spring is effective than to the other feedroll, but out of front-and-rear alignment with the point on the hanger where the spring is effective, and. means for guiding the hanger for up-anol-clown movement and for restraining the hanger against rocking movement.

21. In a typewriting machine, in combination, a platen, front and rear feed-rolls normally occupying a position to co-operate with the lower part of the platen, a hanger common to both front and rear feed-rolls, a spring effective on the hanger between the feed-rolls and at a point nearer the rear than to the front feed-roll to urge both feed-rolls toward the platen, a cast-off device effective to apply roll-withdrawing force to the hanger at a point between the front feed-roll and the point at which the spring is effective on the hanger, and at a point nearer to the rear feed-roll than to the front feeclro11, and means for guiding the hanger for up-ancl-clo-wn movement and for restraining the hanger against rocking movement.

ALFRED G. F. KUROWVSKL Witnesses:

CATHERINE A. NEWELL, JENNIE P. THORNE. 

